Contrast threshold measurements of peripheral targets in night-time driving images

Abstract

Properly defining the visual adaptation field in night-time driving conditions is important in order to implement the CIE 191 system of mesopic photometry. In night-time driving, visual scenes include several objects with different luminances. The luminance distribution affects visual performance. In this study, contrast threshold measurements were conducted using simulated night-time driving images taken from a street illuminated by LED light sources. A large screen illuminated by three projectors, providing a visual field subtending 180° ×44°, was used to provide the background and target. Ten subjects (mean age 30 years) participated in the experiment. The subjects were asked to detect the targets appearing at different eccentricities (from −60° to 60°). The results indicate that the target luminance and luminance distribution of the surrounding area affects peripheral target detection. Under similar luminance distributions, the contrast threshold values did not differ between circular 10° and 20° fields of view. The results support the importance of the area surrounding the road for the visual adaptation field.

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References

Commission Internationale de l’Eclairage. Recommended System for Mesopic Photometry Based on Visual Performance. CIE Publication 191-2010, Vienna: CIE, 2010.

Eloholma

Ketomäki

Orreveteläinen

Halonen

. Visual performance in night-time driving conditions. Ophthalmic and Physiological Optics 2006; 26(3): 254–263.

Viikari

Chen

Eloholma

Halonen

Chen

. Comparative study of two visual performance based mesopic models based on reaction time and contrast threshold data. Light and Engineering 2006; 14: 21–32.

Raphael S, Leibenger M. Models of mesopic photometry applied to the contrast threshold of peripheral and foveal objects: Proceedings of 26^th session of the CIE-Beijing, Beijing, China, 2007.

Akashi

Rea

Bullough

. Driver decision making in response to peripheral moving targets under mesopic light levels. Lighting Research and Technology 2007; 39: 53–67.

Uchida

Ohno

. Defining visual adaptation field for mesopic photometry: Does surrounding luminance affect peripheral adaptation? Lighting Research and Technology 2014; 46: 520–533.

Illuminating Engineering Society of North America. Spectral Effects of Lighting on Visual Performance at Mesopic Lighting Levels. IES TM-12-12. New York, NY: IESNA, 2012.

Narisada

. Visual perception in non-uniform fields. Journal of Light and Visual Environment 1992; 16(2): 81–88.

Narisada

. Visual perception in non-uniform fields. Journal of Light and Visual Environment 1995; 19(2): 5–14.

10.

Howard

Tregear

Werner

. Time course of early mesopic adaptation to luminance decrements and recovery of spatial resolution. Vision Research 2000; 40: 3059–3064.

11.

Plainis

Murray

Charman

. The role of retinal adaptation in night driving. Optometry and Vision Science 2005; 82(8): 682–688.

12.

Matesanz

Issolio

Arranz

de la Rosa

Menedez

Mar

Aparico

. Temporal retinal sensitivity in mesopic adaptation. Ophthalmic and Physiological Optics 2011; 31: 615–624.

13.

Goodman

Forbes

Walkey

Eloholma

Halonen

Alferdinck

Freiding

Bodrogi

Varady

Szalmas

. Mesopic visual efficiency IV: A model with relevance to night-time driving and other applications. Lighting Research and Technology 2007; 39: 365–392.

14.

Ketomaki J. Effects of lighting parameters on contrast threshold in the mesopic and photopic luminance ranges. PhD thesis. Espoo: Helsinki University of Technology, 2006.

15.

Cengiz

Puolakka

Halonen

. Reaction time measurement under mesopic light levels: Towards estimation of the visual adaptation field. Lighting Research and Technology. First published 20 October 2014. DOI: 1477153514554494.

16.

Aguirre

Colombo

Barraza

. Effect of glare on reaction time for peripheral vision at mesopic adaptation. Journal of Optical Society of America A 2011; 28(10): 2187–2191.

17.

Uchida

Ohno

. Defining the visual adaptation field for mesopic photometry: How does a high-luminance source affect peripheral adaptation? Lighting Research and Technology. First published 25 November 2014.. DOI: 1477153514558963.